BioGuard Arctic Blue Shock Size:2 lb This treatment improves filtration system

This treatment improves filtration system performance by removing contaminants that cause clogging

so a little goes a long way

which provides highly-accurate results concerning the three main components of spa chemistry: pH

total chlorine

Keeping your pool's pH level balanced is not only important for swimmer comfort

BioGuard Arctic Blue Shock Size:2 lb This treatment improves filtration systemBioGuard Arctic Blue Shock is the perfect first step in winterizing your pool, killing off bacteria, algae, and other contaminants that can wreak havoc on your pool during the long winter months. Its powerful granular formula can be quickly broadcast into your pool without needing dilution, saving you from handling messy liquids. When used in conjunction with an effective algaecide, your pool will stay clean and healthy throughout its winter slumber,